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RE: IBC 2000 Seismic maps

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The IBC maps have contour intervals as close as 1 mile or less within the
Salt Lake Valley. The need is to have a better reference scale than is
presently given in the 1:3,500,000 IBC

Barry H. Welliver

> -----Original Message-----
> From: Roger Turk [mailto:73527.1356(--nospam--at)compuserve.com]
> Sent: Tuesday, December 18, 2001 3:58 PM
> To: seaint(--nospam--at)seaint.org
> Subject: RE: IBC 2000 Seismic maps
>
>
> Barry Welliver wrote:
>
> . > I have this also, but the files are pdf format and we were looking for
> . > something over which we could lay a county and possible street map.
>
> IMO, when your spectral accelerations are dependent on the street
> where you
> live, or what your zip code is, they are too precise to have any accuracy!
>
> Even the lines on the seismic zone maps in the UBC showing the
> boundaries of
> the seismic zones are probably at least 10 miles wide so any
> place near the
> boundary can easily be on either side of the boundary.
>
> A. Roger Turk, P.E.(Structural)
> Tucson, Arizona
>
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